1 View all Hidalgo County, TX jobs in McAllen, TX - McAllen jobs. 2  Salary Search: Head Start salaries in McAllen, TX.  Related forums: Hidalgo County, TX - Mcallen, Texas.
Iron deficiency anemia  causing blue skin under the eyes. If there is a shortage of iron in the body, oxygen cannot be properly transported by the blood. Hemoglobin is the oxygen transporting component in the blood, moving oxygen from the lungs to the cells where it is released for normal cell metabolism.
color vision deficiency see color vision deficiency. deficiency disease a condition due to dietary or metabolic deficiency, including all diseases caused by an insufficient supply of essential nutrients.iron deficiency deficiency of iron in the system, as from blood loss, low dietary iron, or a disease condition that inhibits iron uptake.See iron and iron deficiency anemia.olor vision deficiency see color vision deficiency. deficiency disease a condition due to dietary or metabolic deficiency, including all diseases caused by an insufficient supply of essential nutrients.